package extendsexamp;

/**
 * @author Administrator
 * 子类：佳能打印机,继承了打印机类
 *   1、继承：open()   print()  close()
 *   2、新增：clean()
 *   3、重写：close()
 */
public class CanonPrinter extends Printer{
    void clean(){
        System.out.println("清除");
    }

    @Override
    void close(){
        clean();
        System.out.println("关闭");
    }
}
